How does breaking up a solid speed dissolving in a liquid?

The atomic number of gold (au) is 79, and the atom has a mass number of 197. how many neutrons are present in the atom of gold?

What must occur in a substance in order to determine a chemical property?

One isotope of a metallic element has the mass number 63 and 33 neutrons in the nucleus. The cation derived from the isotope has 28 electrons.

What is the specific heat of a substance if 1560 cal are required to raise the temperature of a 312-g sample by 5 degrees celsius? A) 0.033 cal/g*C B) 0.33 cal/g*C C) 0.99 cal/g*C D) 1.33 cal/g * C

What is the solubility of PbI2 in 0.4 M KI given the solubility constant of PbI2 is 7.1 x 10-9?

A cylinder contains oxygen at a pressure of 10.0 atm and a temperature of 300.0 K. The volume of the cylinder is 10,000 mL. What is the mass of oxygen gas?

4 - explicar as mudanças de estados fisicos da materia 6 - definir e exemplificar: -Ligações iônicas ou eletrovalente -Ligações covalentes ou molecular 7-definir substancias puras e suas clasificações 8-definir e exemplificar misturas homogeneas e

What ion forms when an acid is dissolved in a solution?

Suppose you found a material in which 12.5% of the original radioactive atoms were present. if the half-life is 47 years, how old is the material?

How many neutrons does xenon have?